KXF 250 2007 for KX500AF

[Reddy]

Today I've take the K5 engine out of its frame
and took a quick look how it would fit.
It looks like "only" the Y section and some engine mounts are in the wrong place.
First I'll take the cilinder of and will drill the swingarm bolt hole. Thinking to take clutch
cover and clutch basket/hub off for smooth survice to rest on.
Will post some pics next time( if the battary's aren't empty)


Dutchie

How much did you strip the engine down before you drilled the swinging arm?
I'm gonna be drilling mine this week.  Did you do each side seperate or just run a pillar drill through them both?

[Dutch-K5 Fan]

I've taken the clutchcover of, than the clutch complete, kickstarter axel and some
position pins out. Layed it down on the clutch side so you have a flat base.
First used a batery drill witch a VERZINKBOOR(dutch word), see picture.
Thought it would guide the drill a bit better because it hase 3 cutting surfaces.
But with a good 17mm drill it would go just fine.
And used a pillar drill with 17mm drill and did it from one side with some help.
One man holding the engine and one man drilling.

The idea of doing it is a lot more scary than it realy is.


Dutchie

[Dutch-K5 Fan]

The springs are the same basic part number for both KX500 and KX250f. The stock 250 has a 5.1 and most 500's that year are about a 5.6 rate. How much do you weigh?


JFAB

I'm a 80kg dutch bloke

Whant a heavier spring for the extra power of the K5. Have been kicked of
the steel beast once or twice and landed a couple of yards further up
So the rear and front suspension of course have good adjusted.

Any idea's Jfab??


dutch

[jfabmotorsports.com]

Racetech helped me set up my suspension. Mine is set up for motocross and uses the recommended springs off the Racetech web site. The valving is a bit more custom. It handles just like my KX450f but with way more gittyup.....WAY MORE.
  According to the charts your stock springs are just about right unless your are going to supercross it.

http://www.racetech.com/evalving/SpringRateCalculation/dirtspring.asp?brand=Kawasaki&yr=2007&ml=KX250F&formuse=form1&SpringType=Fork

[Dutch-K5 Fan]

Racetech helped me set up my suspension. Mine is set up for motocross and uses the recommended springs off the Racetech web site. The valving is a bit more custom. It handles just like my KX450f but with way more gittyup.....WAY MORE.
  According to the charts your stock springs are just about right unless your are going to supercross it.

http://www.racetech.com/evalving/SpringRateCalculation/dirtspring.asp?brand=Kawasaki&yr=2007&ml=KX250F&formuse=form1&SpringType=Fork

Your AF is based on a 450, mine on a 250. And 450's have already heavier springs because
the engine is heavier and has more power. Thats wy I'm thinking to need heavier springs.
But we will see how it will work.


Dutchie

[jfabmotorsports.com]

Im working on another one now. If you can weigh the frame and all its pieces, I will tell you what the difference is. That will give you an idea of the finished weight. Im thinking about a pound maybe two will be the defference.
   Im thinking that you are a good month away from setting sag even if you don't sleep.

[Dutch-K5 Fan]

Lets hope it will be done soon. Have to lurn riding the beast. Have ridden
a rmz250 for about 4 year, and a couple of times the k5. In Juni we have
a local festival cross where I, my dad, brother, uncle and lost of other help to organice.
Mostly I ride the superclass(fasted), and whant to beat mine dad's bosses.
To proof 500 2stroke are the test bike's. But it's a hardpack track.
Atleast I have a good reason to ride verry much now
Gone look if I can weigh the pieces for the "How To AF Handbook" .


Dutch

[Dutch-K5 Fan]

I went to Joey Bon today for my frame. His news was very good!!
But also went to my local race shop for some more backup info.
He has some more radical idea's, to go JFAB's way.
My probleme is that  there is no room for the radiator/exhaust/frame. So there is more work
for me to do . But Rome wasn't build in one day


Dutchie

[Dutch-K5 Fan]

After searching where I posted my OWN post about my AF.

I can tell that after some difficulties its going the right way.
Hope to let my frame welded next week. Made a verry nice looking billet Y section for the frame.
Only the camera doesn't work now(bast@$#).
Bought a new exhaust mufler combo for ?200,-
So FINALLY it's a coming together.

Question???

Should I use a 2000 cr250 airboot, the KX500  airboot or a kx250 one??

Because I use a KXF250 frame the rear rim is 19" 1.85?

Should I use that one or a wider 2.15 or 2.50? Like the K5 use.



Dutchie

[Dutch-K5 Fan]

I've made some pic's with my phone.

Made a billet Y section from 350x140x40mm 6082T6 alu.

Used a bandsaw and milled the rest of it. Have some pic's on the broken cam during milling.

Dutchie

[gianni2takt]

wooooow i didn't now you are working on this very nice project!!!! its gona be a very nice machine

[Dutch-K5 Fan]

wooooow i didn't now you are working on this very nice project!!!! its gona be a very nice machine

It's taken me a long time now. Maybe even befor you Gianni
And I've been busy with somthing else because of some delays with the bike.
May23 me and a college are gone compeet in a tracktorpull.

Normal 65 bhp, now 100 bhp. Made by TURBO. HAHA

Dutchie PS here's the beast

[serafin]

Dutch, I'll put up my John Deere against your Komatsu any day

serafin

[Dutch-K5 Fan]

Dutch, I'll put up my John Deere against your Komatsu any day

serafin

At work we are just trying to get rid of those green and yellow one's Just kidding.

I posted the wrong pic btw.
It's the Explorer 65   But put another pic of a small one.

Dutch

[Dutch-K5 Fan]

YES!!!!!!! My frame is welded  a hour ago!!!!  Tomorrow will try post some pics.




Dutchie